A.The subnet is the IP address block in the VPC. All cloud resources in the VPC must be deployed in the subnet.

B.The network segment of the subnet must be within the range of the VPC network segment

C.The network segment cannot be modified after the VPC is successfully created

D.The subnet segment under the same VPC can be repeated

A.No need to buy and install any software and hardware

B.Just pay the RDS rental fee

C.Reduce DBA skills requirements and costs

D.Expensive DBA costs

A.True

B.mistake

A.Anti-SQL injection

B.Prevent excessive flow

C.Anti-Web hell upload

D.Anti-leech

A.Realize more flexible service forwarding

B.Provide routing balancing capabilities based on domain names and URLs

C.Shield the real ip from the outside to achieve the purpose of security protection

D.Suitable for web services with large traffic